margin in Biological Definition

Leaf

... subtypes of venation, craspedodromus (the major veins stretch up to the margin of the leaf) and camptodromous (major veins come close to the margin, ... leaf Leaf shapes See Leaf shape Leaf margins The leaf margin is characteristic for a genus and aids in determining the species. ...

Barbiturate

... use, one can rapidly develop tolerance , physical dependence, and psychological dependence to barbiturates. With the development of tolerance, the margin of safety between the effective dose and the lethal dose becomes very narrow. That is, in order to obtain the same level of intoxication, the ...

Cancer

... or the entire organ. Since a single cancer cell can grow into a sizeable tumor, removing only the tumor leads to a greater chance of recurrence. A margin of healthy tissue is often resected to allow for small amounts of residual tumor cells. In addition to removal of the primary tumor, surgery is ...

Cytoplasm

... cell. In the first case, it is named cytogel and is a viscid solid mass. In the second case, called cytosol , is a liquid in movement. In general, margin regions of the cell are gel-like and the cell's interior is liquid. The insoluble constituents of the cytoplasm are organelles (such as the ...

Gregor Mendel

... and Mendelian genetics during their lifetimes. Mendel had read a German translation of Darwin's Origin (as evidenced by his notes in the margin of the copy in his monastery), but apparently failed to realize its significance. Darwin received a copy of Mendel's paper, but he did not read it ...

Liver

... vein which supplies nutrients to the growing fetus. The umbilical vein enters the abdomen at the umbilicus, and passes upward along the free margin of the falciform ligament of the liver to the inferior surface of the liver. There it joins with the left branch of the portal vein. The ductus ...